It is usually not recommended to wash your hair during these two times of the morning and evening, and it is best to wash your hair at noon. However, if there is no time at noon and you must wash your hair in the morning, it is recommended that it is best to wash it 20 minutes after you wake up, and also pay attention to ensure that the room temperature is not too low. If you must wash your hair at night, it is recommended to dry your hair and also pay attention to keep warm. 1, wash your hair in the morning: as people just wake up, the blood circulation is slower, and the head skin is also more sensitive in the morning, when washing your hair, warm water stimulates the scalp, which may lead to accelerated blood circulation in the body, which in turn may lead to head discomfort. Therefore, do not wash your hair in the early morning when you first wake up, so as not to make the various organs in the awakening stage suddenly stimulated after causing strong discomfort; 2, wash your hair at night: many people choose to wash their hair at night because there is no time during the day, wash your hair at night need to do a good job of keeping warm, the body resistance of people, body temperature regulation function is normal, heat production and heat dissipation two processes are more balanced. But if the body resistance is weak, the ability to automatically regulate body temperature is poor, the whole body or local cold is easy to catch a cold, and if you wash your hair, sleep in the case of hair not dry, easy to cause headaches. Therefore, it is best to choose to wash your hair at noon, when all the functions of the body are in normal operation, which is conducive to the evaporation of moisture after washing your hair and does not easily cause a cold.